Lifting-jack.



No. 764,677. PATENTED JULY 12, 1904.

M G RICHARDS LIFTING JACK.

APPLICATION FILED JULY 14, 1903.

2 SHEETSSHEET 1.

NO MODEL.

No. 764,677. PATENTED JULY 12, 1904. M. G. RICHARDS.

LIFTING JACK. APPLICATION FILED JULY 14, 1903.

:No MODEL. 2 SHEETSSHBET z UNITED STATES Iatented July 12, 1904.

PATENT OEEicE.

MAROIUS O. RICHARDS, OF AURORA, ILLINOIS, ASSIGNOR TO \VILOOXMANUFACTURING COMPANY, OF AURORA, ILLINOIS, A OORPORA- TION OF ILLINOIS.

LlFTlNG-IJACK.

SPECIFICATION forming part of Letters Patent No. 764,677, dat d July 12,1904,

Application filed July 14, 1903- lb alt w/wm it 712.1141 concern.-

Be it known that I, MARoIUs O. RICHARDS, a citizen of the United States,residing at Aurora, in the county of Kane and State of Illinois, haveinvented certain new and useful Improvements in Lifting-Jacks, of whichthe following is a specification, reference being had to theaccompanying drawings. I

My invention relates to lifting-jacks, and particularly to jacksdesigned for use in connection with'carriages, wagons, &c., and has forits object to provide an improved liftingjack of simple and economicalconstruction in which certain advantages are secured over priorconstructions. Such advantages consist principally in an arrangement bywhich when the lifting-bar is in its elevated position it isautomatically locked therein and in an arrangement of the levermechanism for raising and lowering the lifting-bar, so that the highestdegree of efficiency is secured. These advantages are secured by theconstruction and arrangement of parts hereinafter described, andillustrated in the drawings.

What I regard as new is set forth in the claims.

In the accompanying drawings, Figure 1 is a side view showing thelifting-bar in its lowermost position. Fig. 2 is a similar view showingthe lifting-bar locked in its elevated position. Figs. 3 and 4 aredetails of the adjustable support carried by the lifting-bar. Fig. 5 isa plan view of the jack. Figs. 6 and T are side and edge views,respectively, of the connecting-link by which the operating-lever isconnected with the lifting-bar. Fig. 8 is an edge view of thelifting-jack. Fig. 9 is a cross-section of the lifting-bar on line 9 9of Fig. 1, and Fig. 10 is a cross-section of the standard on line 10 10of Fig. 2.

Referring to the drawings, 11 indicates the standard, which, as shown inFigs. 1 and 8, is composed of two parallel curved bars 12 and 13, spaceda short distance apart and mounted on a suitable base-plate 14, beingsecured thereto by rivets,or in any other suitable manner. The bars 1213 are spaced apart to provide for mounting the operating parts of theSerial No. 165,496. (No model.)

lifting-jack between them, thus providing a very firm and substantialconstruction.

15 indicates the lifting-bar, which, as best shown in Figs. 8 and 9, iscomposed of two straight parallel bars 16 and 17, which are also spaceda short distance apart, spacingblocks 18 being provided between them, asindicated in dotted lines in Fig. 1. The bars 16 and 17 of thelifting-bar 15 are provided with a series of notches 19 in their inneredges near their upper ends, as shown in Fig. l, to receive the ends ofa cross-pin 20, carried by a movable support 21, which is adapted to beadjusted upon the lifting-bar and'serves to support theaXle of thevehicle or other article to be lifted.

22 indicates a second cross-pin provided in the support 21, adjacent tothe opposite edges of the bars 16 and 17, as best shown in Fig. 9..

The cross-pins 20 and 22 are in different horizontal planes, so that bytilting the support 21 it may be raised or lowered upon the liftingbarto adjust it to any desired height. This form of support, however, isnot herein claimed. The lifting-bar 15 is connected with the standard 11by means of a short upper link 23, pivoted between the bars 16 and 17,as shown in Fig. 2, and also pivoted between the bars 12 and 13 of thestandard, at the upper portion thereof, as shown in Fig. 2. The link 23is of such length that the lower end of the lifting-bar is at all timesbetween the vertical portions of the bars 12 and 13 at one side ofthe'standard, as shown in Fig. 2, so that the lower end of thelifting-bar is prevented thereby from being displaced laterally.

24 indicates a long lower link which extends between the bars 12 13 ofthe standard at both sides thereof, being pivoted at 25 to the standardand at 26 to the lower end of the lifting-bar, between the members 16 17of which it extends, as shown in Fig. 2. The pivots connecting the links23 and 24, respectively, with the standard are at different distancesfrom the lifting-bar, the pivot 25 of the lower link 2A beingfarthertherefrom.

27 indicates one end of the link 24:, which extends beyond the pivotalpoint 26 and is connected by a pivot 28 with a link 29, the opposite endof which is connected by a pivot 30 with an operating-lever 31. As shownin Fig. 2, the operating-lever 31 is pivoted at 32 between the members12 13 of the stand ard 11, preferably about midway of the height of thestandard. .he end portions of the link 29 are bent, as shown in Fig. 6,and they are preferably bifurcated, as shown at 33 and 3a in Fig. 7, soas to embrace the lever 31 and the projecting end of the link 24. Theobject of bending the end portions of the link 29 is to provide for thealining of the pivots 30, 32, and 28 when the lifting-bar is in itsuppermost position, as illustrated in Fig. 2. By connecting link 29 withthe lifting lever 31 between the ends of said lever and providing forthe alinement of the pivotal points above mentioned I securethe'automatic locking of the lifting-bar when in its uppermost position,which is an important advantage in liftingjacks of this character.Furthermore, by mounting the lifting-bar on the swinging links 23 and24:, as described, when the lifting-bar is raised or lowered it moves ina substantially vertical line between the members of the standard.Consequently the supporting parts are not subjected to undue strain inthe operation of the jack. I am thus enabled to construct thelifting-bar of lighter materials than has heretofore been practicable,and. this also is an important advantage in implements of thisdescription.

That which I claim as my invention, and desire to secure by LettersPatent, is

1. A lifting-jack, comprising a standard composed of parallel curvedbars spaced apart and secured upon a suitable base, a lifting-barprojecting between the members of said standard, links connecting saidlifting-bar with said standard, an operating-lever fulcrumed upon saidstandard between the members thereof, and a link extending between themembers of said standard connected at one end to said operating-leverand at the other end to one of said first-mentioned links, substantiallyas described.

2. A liftingjack, comprising a standard composed of parallel curved barsspaced apart and secured upon asuitable base, a lifting-bar projectingbetween the members of said standard, links connecting said lifting-barwith said standard, an operating-lever fulcrumed upon said standardbetween the members thereof, and a link extending between the members ofsaid standard, connected at one end with said. operating-lever and atthe other end with a projecting portion of one of said first mentionedlinks, substantially as described 3. A lifting-jack, comprising astandard, a lifting-bar, links pivotally connecting said lifting-barwith said standard, an operatinglever fulcrumed at one end upon saidstandard, and a bent link pivotally connected to said lever between itsends and connected with said lifting-bar, substantially as described.

MARCIUS C. RICHARDS.

WVitnesses:

E. M. SPRINGER, W. S. FERRIS.

